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A calcium–aluminium-rich inclusion or Ca–Al-rich inclusion (CAI) is a submillimeter- to centimeter-sized light-colored calcium- and aluminium-rich inclusion found in carbonaceous chondrite meteorites. The four CAIs that have been dated using the Pb-Pb chronometer yield a weighted mean age of 4567.30 ± 0.16 Myr.
The following inclusion types can also be found in aluminium alloys: alumina needles (Al 2 O 3), nitrides (AlN), iron oxides (FeO), manganese oxides (MnO), fluorides (Na 3 AlF 6, NaF, CaF 2, …), aluminium borides (AlB 2, AlB 12), borocarbides (Al 4 C 4 B). Bone ash (Ca 3 (PO 4) 2) sometimes added to patch cracks in the trough can be found as ...
The main constituent, and also the most reactive phase, of calcium aluminate cements is the monocalcium aluminate (CaAl 2 O 4 = CaO · Al 2 O 3, also written as CA in the cement chemist notation). It usually contains other calcium aluminates as well as a number of less reactive phases deriving from impurities in the raw materials.
Al-Ca composite is a high-conductivity, high-strength, lightweight composite consisting of sub-micron-diameter pure calcium metal filaments embedded inside a pure aluminium metal matrix. The material is still in the development phase, but it has potential use as an overhead high-voltage power transmission conductor . [ 1 ]
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The California Agricultural Labor Relations Act (CALRA) [note 1] is a landmark [2] statute in United States labor law that was enacted by the state of California in 1975, [3] establishing the right to collective bargaining for farmworkers in that state, a first in U.S. history.
Coppess, Jonathan, et al. "The Agriculture Improvement Act of 2018: Initial Review." farmdoc daily (2018). online; Gardner, Bruce L. "The federal government in farm commodity markets: Recent reform efforts in a long-term context." Agricultural History 70.2 (1996): 177–195. online; Matusow, Allen J. Farm policies and politics in the Truman ...
Proposition 12 ("Prop 12") was a California ballot proposition in that state's general election on November 6, 2018. The measure was self-titled the Prevention of Cruelty to Farm Animals Act . [ 2 ] The measure passed, by a vote of about 63% Yes to 37% No. [ 3 ]